Vehicle-brake.



PATENTEE SEPT. 1s, 1904 i.. G. NILsoN. VEHICLE BRAKE. Y PPIJULTIOI FILEDAPLVIE. 1903. BEE'ED 53:3 l0. 190

I0 IODEL.

Witnesses/C. NTO! l n I mu@ H'omlmJ I UNITED STATES Patented September13, 1904.

PATENT OFFICE. i

LABS e. N1LsoN,oF NEW YORK, N. Y., AssIGNon or' Two-Tamps To SIEGFRIEDM. FISCHER AND HARRY s., riscHER, or NEW YRK. N. Y.

VEHICLE-BRAKE.

SPECIFICATION forming part of Letters Patent No. 770,101, datedSeptember 13 1904.

.Application filed April 15, 1903. Renewed June 30, 1904. Serial No.214,727. (No model.)

To all whom it mag/'concerne Be it known that I, LABS G. N ILsoN,acitizen of the United States, residing at New York city, in the countyof New York and State of New York, have invented certain new and usefulImprovementsin Vehicle-Brakes,of which the following is a full,clear,and exact specilication:

rlhis invention relates to improvements in vehicle-brakes, and has forits object to provide a brake which shall be quick, powerful, andreliable and simple in construction, so that it will not easily getoutof order.

In certain classes of vehicles, more especially in automobiles, wherethe distance between the operator and the driving-wheels is great andwhere the space between the wheels is occupied by apparatus of variouskinds, it becomes very diiiicult to apply the ordinary brake. Such abrake is also inefiicient and when applied to heavy trucks, omnibuses,Sac.,

'incapable of acting with suiiicient rapidity andn power in case ofemergency. Such .brakes also become ineiiicient withwear and continuallyneed adjustment. To'overcome these diiiiculties, I have constructed afluid-pressure brake controlled from the drivers seat. By

dispensing with levers, links, &c., the brakes can be located intheinost advantageous position both with reference to the wheels and tothe driver. By the use of a hydraulic brake the power can beproportioned to the size of the vehicle by varying the ratio between thecylinders, and at the same time much weight and mechanism are saved.

Referring to the drawings, Figure 1 shows the brake applied to anautomobile deliverywagon. Fig. 2 is' a detail showing the pumpcylinderand reservoir detached. Fig. 3 is a plan showing the brake-cylinderconnected with a brake-beam. Fig. 4 shows a modification in which eachbrake-shoe is controlled by a separate cylinder.

1 represents a cylinder containing the piston 2. The piston 2 isconnected by a link 5 with a lever 3, pivoted at 4 en the body of thevehicle. The'leve: 3 is bent so as to rest close to the dashboard to beout of the way and also to permit the pump to be located under theplatvthe brakes.

form. At the bottom of cylinder 1 is a check-v valve 6, opening upwardand connected with a rese rvoir by a. pipe 8. From the lower portion ofthe cylinder 1 a passage 9 leads through a check-valve 10120 a chamber11. From the chamber 11 a passage 12 leads to a brake-cylinder 13. Fromthe chamber 11 another passage 15 leads to the reservoir 7. The passage15 containsa valve 16, which is normally shut, but can be opened by theoperator to release the brakes.

17 is a lever attached to the valve-stem and 'connected with a rod 18,'which may be debeam may be carried in any suitable manner,

as by links 29l in Fig 1.

21 represents springs attached to the body,

which retract the brake-shoes and the pistonv when the valve 16 isopened by the operator to permit the Huid to How back to the reservon'.

In Fig. 4 two brake-cylinders are used. Each cylinder connects with thepassage 12 and is carried by a bracket 24:, attached to the body or tothe truck. carried by a link 27, which is pivoted on the bracket24. Thesprings 2l hold the brakeshoes retracted.

When it is desired to apply the brake, the

-operator takes a few strokes with the lever 3.

The Huid, preferably oil, is pumped from the reservoir throughcheck-valve 6 on the upstroke of the piston 2. On the downstroke thevalve 6 closes and the fluid is forced through valve 10 to thebrake-cylinder 13 and applies The pressure in the brake-cylinder dependsupon the lratio between the pistous 2 and 14. brakes by permitting thefluid to How back into the reservoir, the springs 21 helping to expelthe Huid. Thus the same fluid is used over and over without waste. Thevalve 10 The brake-shoe 26 is The valve 16 releases the prevents thefluid from flowing back into the pump-cylincer, and the brakes are heldset automatically until the valve 16is opened by the operator. Thepressureiof the brake can be regulated by the operator by manipulatingthe valve 16.

" With the form shown in Fig. 4 it will be ply the brakes, as thebrake-cylinder will always be partially filled with fluid.

I do not restrict myself to the specific construction which I have'illustrated, but reserve thc right to use modifications and equivalentswithin the scope of the invention.

The invention is also applicable to other types of brakes than that Ihave illustrated,

and I do not desire to be limited to anyparticular form'o brake Havingthus described my invention. I declare that what I claim as new, anddesire to secure by Letters Patent, is

1. In a vehicle-brake, a lever pivoted on the body, a pump connectedwith said lever, a reservoir supplying said pump, a brake-cylinder,brake mechanism actuated thereby, a valve between the pump and thereservoir, a second valve between the pump and the brake-cylinder, and amanually-controlled valve between.' the brake-cylinder and thereservoir, substantially as described.

2. In a vehicle-brake, a bracket carrying a brake-cylinder, a linkpivoted to said bracket carryinga brake-shoe, a spring attached to saidlink and to said bracket and a connection between said link and thepiston of the brakecylinder, substantially as described.

3. In a vehicle-brake, the combination with a body, of a lever pivotedthereon and bent to rest close to the platform, a pump connected withsaid lever, brake mechanism actuated by said pump and means controlledby the operator for releasing said brake mechanism, substantially asdescribed.

4. In avehicle-brake, the combination with a body, of a lever pivotedthereon and bent to rest close to the platform, a pump located below theplatform and connected with said lever, the lever being bent between thepivot and the connection with the pump, brake mechanism actuated by saidpump, and means controlled by the operator for releasing said brakemechanism, substantially as described.

5. In a vehicle-brake, the combination with a pump, of asupply-reservoirtherefor,a brakecylinder directly connected with said pump,

means for actuating the pump to apply the brake, a valve preventing iiowfrom the brakecylinder to the pump, a valve preventing flow from thepump to the reservoir, a pivoted releasing-valve to permit thebrake-cylinder to exhaust into the reservoir, and connections contrciledby the operator for operating said valve to release the brake,substantially as described.

6.' In afvehicle-hrake, a lever pivote-d on the body, a pump connectedwith said lever, a reservoir supplying said pump, a brake-cylinder andbrake mechanism actuated thereby, a valve between the pump and thereservoir, a second valve between the pump and the brake-cyllnder, and avalve controlled by the foot of the op-l erator between thebrake-cylinder and the reservoir, substantially as described.

7. In a vehicle-brake, a lever pivoted on the body, a pump connectedwith said lever, a reservoir supplying said pump, a brake-cylinder, abrake-beamv carrying brake-shoes actuated thereby, springs attached tothe body for withdrawing the brake-beam, a valve between the pump andthe reservoir, a second valve between the valve and the brake-cylinder,and a releasing-val ve under the control of the operator between thebrake-cylinder and the reservoir, substantially as describe In testimonywhereof I alix my signatur e 1n presence of two witnesses.

' LARS G. NILSON.v Witnesses: t

HARRY S. FISCHER, y C. H. C. JAGELS.

